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New York 45th Infantry (Union)

9/9/61

Organized - New York 45th Infantry - New York

12/2/61

Battle - Annandale, Virginia

6/8/62

Battle - Cross Keys - Rockingham County, Virginia

Cross Keys
Cross Keys

Maj. Gen. John C. Frémont's and his 11,000-man Mountain Department army were tasked with keeping Maj. Gen. Thomas J. "Stonewall" Jackson's two-division force engaged in the Shenandoah Valley and unable to join with Robert E. Lee's army defending Richmond during the Peninsula Campaign against the Confederate capital. In early June, Jackson's men under Maj. Gen. Richard S. Ewell were encamped in the vicinity of Cross Keys on the South Fork of the Shenandoah River. Union screening cavalry approached Jackson f…READ MORE

12/13/62

Leadership Change - Brigade - Colonel Leopold Von Gilsa

12/13/62

Leadership Change - Division - Brigadier General Nathaniel C. McLean

Brigadier GeneralNathaniel C. McLean

12/13/62

Battle - Fredericksburg - Fredericksburg, Virginia

Fredericksburg
Fredericksburg

In early November, Maj. Gen. Ambrose E. Burnside took command of the Army of the Potomac, and made immediate plans to move the army once again toward Richmond.READ MORE

4/30/63

Leadership Change - Brigade - Colonel Leopold von Gilsa

4/30/63

Leadership Change - Division - Brigadier General Charles Devens Jr., and Brigadier General Nathaniel C. McLean

Brigadier GeneralCharles Devens Jr.

Brigadier GeneralNathaniel C. McLean

4/30/63

Leadership Change - Division - Brigadier General Charles Devens Jr.

Brigadier GeneralCharles Devens Jr.

4/30/63

Battle - Chancellorsville - Spotsylvania County, Virginia

Chancellorsville
Chancellorsville

On April 27, 1863, Maj. Gen. Joseph Hooker launched a turning movement designed to pry Robert E. Lee's Army of Northern Virginia out of its lines at Fredericksburg.READ MORE

7/1/63

Leadership Change - Brigade - Brigadier General Alexander Schimmelfennig, and Colonel George von Amsberg

7/1/63

Leadership Change - Division - Brigadier General Alexander Schimmelfennig, and Major General Carl Schurz

Brigadier GeneralAlexander Schimmelfennig

Major GeneralCarl Schurz

7/1/63

Leadership Change - Regiment - Lieutenant Colonel Adolphus Dobke

Lieutenant ColonelAdolphus Dobke

7/1/63

Battle - Gettysburg - Gettysburg, Pennsylvania

Gettysburg
Gettysburg

In the summer of 1863, Confederate Gen. Robert E. Lee launched his second invasion of the Northern states. Lee sought to capitalize on recent Confederate victories and defeat the Union army on Northern soil, which he hoped would force the Lincoln administration to negotiate for peace. Lee also sought to take the war out of the ravaged Virginia farmland and gather supplies for his Army of Northern Virginia. Using the Shenandoah Valley as cover for his army, Lee was pursued first by Union Maj. Gen. Joseph Ho…READ MORE

10/28/63

Leadership Change - Brigade - Brigadier General Hector Tyndale

Brigadier GeneralHector Tyndale

10/28/63

Leadership Change - Division - Major General Carl Schurz

Major GeneralCarl Schurz

10/28/63

Battle - Wauhatchie - Hamilton County, Tennessee

Wauhatchie
Wauhatchie

Wary of troops marching to the aid of the Federal army besieged at Chattanooga, General Braxton Bragg ordered General James Longstreet to take action against the force massing in Lookout Valley. In a rare nighttime attack, a division of Longstreet's corps attacked the Union rearguard near the crossroads of Wauhatchie. The brief fight was a bloody repulse for the Confederates, who were forced to withdraw. The Confederates had missed their last best chance to prevent supplies from reaching the Union Army of…READ MORE

5/25/64

Battle - New Hope Church - Paulding County, Georgia

New Hope Church
New Hope Church

During early May 1864, Maj. Gen. William T. Sherman successfully outmaneuvered the army of Gen. Joseph E. Johnston in multiple battles in northwest Georgia. Each time, Johnston fell back to a new defensive position closer to the strategic Confederate city of Atlanta. After Johnston retreated to Allatoona Pass on May 19-20th following the battle at Adairsville, Sherman determined to move around Johnston's left flank rather than attack the strong Confederate defenses in his front. On May 23rd, Sherman set in…READ MORE

6/22/64

Battle - Kolb's Farm - Cobb County, Georgia

Kolb's Farm
Kolb's Farm

On the night of June 18-19, 1864, Gen. Joseph E. Johnston moved into a defensive position on Kennesaw Mountain. Having encountered entrenched Rebels there stretching southward, Maj. Gen. William T. Sherman extended his right to envelop their flank with Maj. Gen. John Schofield's Army of the Ohio. Johnston countered by moving Lt. Gen. John B. Hood's corps from his right flank to his left on June 22 to confront Schofield. Hoping to flank Schofield, Hood attacked, moving down Powder Springs-Marietta Road towa…READ MORE

7/20/64

Leadership Change - Brigade - Colonel James S. Robinson

7/20/64

Leadership Change - Division - Brigadier General Alpheus S. Williams

Brigadier GeneralAlpheus S. Williams

7/20/64

Battle - Peachtree Creek - Fulton County, Georgia

Peachtree Creek
Peachtree Creek

Weary of Gen. Joseph E. Johnston's pattern of retreat through northwest Georgia in the face of Maj. Gen. William T. Sherman's advancing armies, President Jefferson Davis removed him from command of the Army of Tennessee, replacing him with Lieut. Gen. John B. Hood. On July 20th, Hood determined to take the fight to the enemy by setting upon an isolated portion of Sherman's forces in front of Atlanta. Hood's target would be the Union corps of Maj. Gens. Oliver O. Howard and Joseph Hooker from Maj. Gen. Geo…READ MORE

12/15/64

Leadership Change - Brigade - Colonel Edwin C. Mason

12/15/64

Leadership Change - Division - Brigadier General John F. Miller

Brigadier GeneralJohn F. Miller

12/15/64

Battle - Nashville - Nashville, Tennessee

Nashville
Nashville

Despite a series of defeats in the closing days of November, 1864, Confederate Lieut. Gen. John Bell Hood continued to drag his bloodied Army of Tennessee, approximately 30,000 strong, north towards Nashville. The city was protected by 55,000 Union soldiers, which should have precluded further offensive operations, but Hood was determined and his situation was dire. Hood reached Nashville on December 2nd and staked out a position south of the city, hoping to draw the Union forces into a costly attack. Ulys…READ MORE

6/30/65

Mustered Out - New York 45th Infantry - New York

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